Ore-sizing apparatus



J. 0. BARDILL.

ORE SIZING APPARATUS. `MPucnlow F|LED1uNE3.19xa.

1,832,967. Patented Mar. 9,1920.

3 SHEETS-SHEET I.

@MM @fn/7?@ J. 0. BARDILL. ORE slzlNG APPARATUS.

APPLICATION FILED JUNE s. Isls. 1 ,332,967, Patented Mar. 9,1920.

3 SHEETS-SHEET 2.

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i Patented Mar. 9,1920.

3 SHEETS-SHEET 3- J. 0. BA'RDILL.

ORE SIZING APPARATUS.

APPLlcAnoN man Jury: a. 191s.'

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JoHN o. isvAnDiIinfor `nnwaniis, NEW 'YORK'.

' 'oansrzrnenrranarus To all 107mm z''mag/ concern:

Be it known that I, JOHN O. VBARDILL,

a citizen of the United States of America, a resident of Edwards, in the countyof St.

Lawrence, State of New York, have invented certain new and useful Improvements in Ore-Sizing Apparatus, of which the following is a full, clear, and exact description, reference being had tothe accompanying tion.

My invention yrelates tol an apparatus for sizing ores, intended to be used inl lieu of the trommels. or shaking screens. The present invention has for its object the construcdrawings, forminga part of this Vspecification of an apparatus of this kind which will afford a large capacity lin the treatment of vcrushed ores by permitting the use of a screen made up of finer wires than are used in the ordinary trommel. and shaking-screen. This object 1s attained by. providing 1n my -apparatus for the distribution of a thin layer of ore `on `the outer surface of a cylindrical revolving screen made of finev wires,

` and causingthe finely crushed ore to pass to the interior of the screen where `it is caught ina suitable receiver and conducted from the apparatus.

' subjected to the'severe strain and wear incivso dent to the use of the trommel and shaking screen in consequence of va mass of` ore being supported by and tumbled or shaken on the screen, while the fine ore is passing therethroughA and the oversize ore is being rejected at an end of the screen.

Figure I is a front elevation `of'my screeni ing apparatus with the feed box shown in Y full lines as in service, and in dotted lines` for access to the interior of the apparatus.

vthe `side walls. ,This support servesvas ja track upon which a feed box Bris adapted Appiicatio'n mea June. 3.1918. serial No. 233ml.

The screen is therefore notl Fig. II isa side elevation, of the appato Vslide so that said feed box may at one time bepositioned directly over the housing', as seen in full lines, Fig. I, and at another time occupy the retracted position shownin dotted lines, Fig. Ip The feed bo'x comprises a receiving compartment b, into vThe material enter- Y specination of Letters Patent. BatentedMan), 1920. 7

9 to the spout-10 and is caused to pass through the latter kin a thin, even How by providing a vertically adjustable guide 11, Which may be raised and lowered relative to the bottom of the spout. The feed box B serves to partiallyclose the top of the housing A, and a removable cover 12 completes the closure.` The feed box. being slidably mountedon the support 8 andthe cover 12 beingremovab-le, access to the interior of they housing A may be quickly accomplished.

13 `designates horizontal shafts extending from front yto rear of the housing A and journaled in suitable bearings secured to the front and rear housing walls. These shafts have fixed to them rollers 14 arranged in pairs, and one ofthe shafts is Vprovided with an extension 13 towhich power de# rived from any suitable source, such as an electric motor mounted onthe housing A, may be applied. Y Y

15 designates deflector walls inclined inwardly from the side walls 5 to the base 1, the lower ends of said walls terminating in proximity to the central outlet opening 2` in said base. i i y n i f v Within the housing A is a screenv kcage comprising end rings l16 joined by connecting rods V17. 'v The rings of this cage rest used in trommels or other forms ofore sizing screens, which must necessarily befheavyto withstand the strain and wear of the load of material resting thereon while being. screened or. sized. Consequently, an area of my screen corresponding to a similar ico Y area of the heavy wire screens ordinarily used in ore sizing apparatus provides av greater number of mesh apertures,` with correspondingincrease in capacity of screening f or sizing operation. Y f

a The ore to be screenel or sized bymy apparatus escapes in a gradual flow from the feed boX B through its spout 1() and becomes by the feathered arrow, Fig. 1, the ore of a size which will pass through the screen moving through its mesh in a course simi lar to that indicated by the downwardly pointing arrows leading' to the interior of the screen, Fig. L while the oversize mate.- rial continues around the surface of the screen, as indicated .by the series of arrows which partially encircle said screen. The oversize material continues in the course last indicated until it escapes throughthe central outlet opening 2 in the base 1.

19 designates a receiving trough into which the screened material is deposited as it descends through thescreen 18. This re ceiving trough Vnormally occupies a position within the cylindrical screen 18, :the trough extending longitudinallyof the screen and being movable 4through an opening in the Y frontwall T of the housing ifi. T he trough through the outlet opening 2.

is preferably-of a shape in cross section and the opening in the front wall is preferably of 4similar shape, so that the bottom ofthe troughis narrower than the top, as seen in Figs. l and 111. At one end of the trough isa discharge openingQO through `which the screened material escapes.

21 designates an upper ing longitufhnallj.Y ofthe and isla lower spray pipe parallel with said Vupper pipe, VThe upper spray pip-e is provided with jet holes through which sprays ofwater may be directed against the cylindrical screen 18 vat its outer. surface at Slutty P1P@ extend apoint opposite and near the delivery of material onto the screen. The purpose of delivering sprays of water onto the screen at this point is to separate fine particles'of ore from .the oversize pieces of ore and cause them to pass through the screeninstead of being carried over withthe oversize pieces.

`The lowerspr'ay pipe 22 Vis located interiv orly of the screen and the jet holes therein are so positioned as to cause water tobe sprayed against the interior ofv the screeni.

whereby the mesh ofthe screen is freed of particles of Vmaterial which lodge therein Vand which tend to clog the mesh to the detriment of the screening; operation. rlhe water fromA thislower spray pipe also assists inn the flow ofthe oversize material to and Water is supplied to the upper .and lower spray pipes froma manifold QBto which a conducting screen and its cage hose .or pipe 24 is attached', and theflow of rwater into said spray pipes is controlled by being drawn outwardly from the interior of the screen 18 and supports the trough when it iswithdrawin To limit the movement of thetrough and yoke when they are drawn outwardly the arms ofthe yoke are provided with 'abutments 29 of any suitable form, adapted to strike against stop lugs 30 locatedinteriorly of the guides 29 (see full lines, `Figs 1 and 111, and dotted lines,

Figll). .f Y

lWhenthe receiving trough 19 isy withdrawn from the interior of the apparatus as just explainedT the spray pipes 21 and 22 move therewith and the rear ends of the trough and spray pipes become positioned at the front end of the housing` A, so that these members offer .no interference to the removal ofthe screen cage with the screen thereon through the top of the housing A. Consequently, by shifting the feed box B to the position seen. in dotted, lines Fig. Vl and removing` the cover 1Q the screen cage may be quickly lifted out of the housing for needed repairs or any other.v attention it may be necessary from time to time to give it.

The deflector walls 15 serve to direct the which would be detrimental tothe bearings ofthe apparatus if it rose to a suiiicient height. The deiiector walls 15 extend only vbetween a'nges of the base 1, as seen ,in Y Fig. 111, and opportunity is therefore afforded for accumulated water t`o` pass around the ends of these walls to reach the discharge openings 3.

Although. Ihave described my" apparatus as an ore sizing apparatus it is obviousV it may be used for screening other materials,

and I therefore do not limit myself to its usel for any particular purpose. Y

I claim: f

1. An apparatus of the characterdescribedcomprising a hollow movably ,mounted screenmeans for delivering material to the Vupper and outer surface of said screen, and

aV receiver within said screen into which the material passing through-said screeneis deposited, said'receiver being movably mount- Y a receiver movably arranged. in said screen adapted to receive the material passing therethrough, and means slidably fitted to said support providing for the withdrawal of said receiver from said screen and adapted to support it when withdrawn.

3. An apparatus of the character described comprising supporting means, a hollow screen movable on said supporting` means, .means for delivering material to the exterior surfaceof said screen, a receiver adapted to receive the material passing through said screen, and supporting means for said Vreceiver inovably fitted to said supporting means, said supporting means being adapted to permit the withdrawal of said receiver from said screen to permit the removal of said screen from said supporting means.

4. An apparatus ofthe character described comprising supporting means, a hollow screen movable on said supporting means, means for moving said screen, means for VVfeeding material to the outer surface of said Y screen movable on said supporting means,

means for rotating said screen, means for feeding material to the outer surface of said screen, a receiver for the material to bev screened movable to and from the interior of said screen, and a supporting yoke secured to said receiver and slidably iitted toy said supporting means, said yoke being provided with means for limiting its movement when tlie'receiver is withdrawn from the interior of said screen.

Y 6. An apparatus of the character described comprising supporting means, a hollow screen movable on said supporting means,

means for delivering material to the exterior of said screen, a receiver movable to the in terior of said screen, means for supporting said receiver permitting its Withdrawal from the interior of the screen, and a spray pipe f movable with said receiver through` which water may be discharged. against said screen when the receiver is` located within the screen. f

7. An apparatus of the character described comprising an open top` housing, kscreen supportingY and operating means-.in said housing, a screen removably seated on said operatingmeans, a feed boX slidably mounted lon said housing through which material is delivered to the exterior surface of said screen, said feed box -being adapted to be shifted to permit the removal of the screen through the top of said housing, and a receiver adapted to receive the materialpassing through said screen as it passestherethrough after delivery from said feed box'.

8. lAn apparatus vof the character described comprising an open top housing, screen operating means in said housing,` a screen supported by said screen operating means, a removable cover partially closing said open top housing, a feed box slidably mounted in juxtaposition. to said cover, said feed box being adapted to be retracted from its normal position to permit the removal of said screen through the top of said housing.

In testimony that I claim the foregoing I hereunto aiiix my signature.

JOHN o. BARDILL. 

